GAS M&O meeting 31 August 2020
Present: Beatrice, Roberto, LPh, Patrick, Kacper, Gianluca, Mara, Leonardo, Fred
ALICE #no elog
TOF
- new calibration requested (7% SF6, 93% He)
TPC
- In stop, maintenance to do
- Discussion about pump module —> to meet this week to finalise
- Modification of purifier on-going: change of electrovalves with pneumatic valves on-going
From previous meeting (03/08)
- In purifier module PuFIS2212 doesn’t work: Patrick explained that is a mechanical problem and he can fix it. The same for CMS RPC Pufirier 1: done for ALICE
- Beatrice showed that purifier module is in force mode and after a power-cut the purifier restart in by-pass. To check with Chilo if with the new software we can put the purifier in auto-mode —> LPh
TRD
From previous meeting (03/08)
- Rack 62, 66, 70 are often in RunNotReady and with oscillation in pressure sensors —> LPh to investigate
- In distribution rack PT sensors with 3 digits —> LPh to fix
CPV
- PT6194: at the limit of 40 mbar —> LPh to change the pressure sensor
From previous meeting (20/07):
- H2O analyser doesn’t work —> to change
- 03/08: new VAISALA not yet ordered —> LPh to do this week
HMP
- Distribution rack in alarm —> LPh to check
MTR
- error in two temperature sensors in purifier —> LPh to check
From previous meeting (03/08)
- several leaks test done few weeks ago: some leaks to fix
ATLAS #2750
MDT
- rack 65 ch 5 pressure error —> reset to do. If it happen again, to change the pressure senso
From previous meeting (20/05):
- Reset of pressure sensors giving problem (elog #2489)
- P&ID test with Gianluca (elog #2576) to check results—> Kacper/Gianluca
- Pump modification will be done in September/October by Patrick
RPC
- Rack 63 modification on-going
- To add impedance in all racks: this and next week
- IR to discuss —> Beatrice to organise a meeting
TRT
From previous meeting:
- Kacper to check for regeneration of purifier material
MM
- construction mixer on-going
CMS #2747
RPC
- MFC installation for Phase 1 of Purifier done last week: test this week —> Mara/Roberto
- Change power-supply of ECONEX valve with old one: test on-going
- Test of iC4H10 concentration with different flows (elog #2743): iC4H10 concentration decrease with the increase of the flow. Roberto explained that this could be due to the fact that the flow passing through the R134a MFC does not increase as we see in WinCC-OA. To do again the same test, now that there is the heating in the R134a cabinet
- GC vs IR measurements different: Mara to order new calibration bottle 5%iC4H10-95%R134a
From previous meeting (20/07)
- two flowcells in errors but difficult access in the rack (#3 in rack 85, #7 in rack 81): change done. Now they are working fine: to check what is was wrong with these flowcells —> Michal
CSC
- problem with one column of purifier: O2 very high: this week test with very long regeneration time and higher flow
GEM
- Now with gas mixture Ar/CO2 70/30
PGS
- Problem with ARCAL 15 stock, now ok
- Roberto found that the heating in the R134a cabinet was off: could it be the reason why we were not able to deliver > 500l/h from the mixer? —> to check status of mixer and IR in the next weeks
LHCb #2748
RICH1
- test of new coupler profibus DP/PA
- several problems in profibus connectors and are not available anymore
- Eric asked to remove the volume that simulates the chamber: ok for now but we need back when we will have to test the new gas system (~November-December)
RICH2
- system ON: to put in run also the purifier
From previous meeting
- Leak found in mixer between black panel and mixer
PIQUET
- Alarm from PGS CO2 pure (elog #1132): piquet went on site and change manually the side. Furthermore Side A and B are swapped wrt WinCCOA. David informed.
- Warning in pressure of rack 65 of ATLAS MDT. No action taken —> Kacper to verify
GENERAL
- Presentation of new students: Federico and Demetrio
- LINAC will be on piquet from 1st September: to ask access —> Fred and Michal
- New Elog featured shown by Gianluca: procedure, alarms, material
- Maintenance procedure: it is time to re-start
- Presentation by Leonardo
- Very important that everybody follows the maintenance procedures prepared
- Maintenance procedure of mixer, exhaust, pump and purifier ready. Distribution on-going.
- To test together exhaust (LPh compulsory) and pump (Kacper compulsory) together —> Beatrice to prepare a doodle
- Planning Aug-Oct discussed: high priority for ATLAS RPC. To finish also electrical of ALICE TPC this week
From previous meeting (20/07):
- PGS: modification of reset for the 100% problem in bottles —> all experiment responsible to do
- Aging test priority
- CF4 membrane, RPC new exhaust flowmeter, black flowmeters Omron, LHCb RI2 Coriolis
- If you want to test other components, please contact Beatrice or Mara. Do not go directly to Kostya
From previous meeting (06/07):
- Canbus quality/error
- Geraldine has a card to check CANBUS quality: to test in exOT gas system —> Michal/Geraldine
- To try to implement in ATLAS RPC
- 03 August
- 03/08 Beatrice to check the status with Geraldine: discussed during the meeting, waiting few slides from Geraldine
From previous meeting:
- Level of PGS sometimes is > 100% —> Michal to check
There are minutes attached to this event.
Show them.
